Investigation Of Moisture Diffusion Process In Fibre Reinforced Composites By Computing Diffusivity Factors Along 3- Perpendicular Directional Axes Of Hot Wet Temperature Resin

ABSTRACT: Moisture diffusion or uptake is one of the phenomenon observed in fibre reinforced composites exposed to marine ambience or water body structures. The materials are exposed to variations in temperatures and humidity. Moisture uptake depends upon the nature of the resin, porosity, temperature, humidity, salt water concentrations, fibre orientation, fibre volume fraction, void content, resin matrix interface, interfacial bonding. Moisture is known to react with one or more of the matrix constituents and hydrolyses the polymer bonds which leads to dissolution of water-soluble molecules and thereby plasticizing the matrix and lowering the glass transition temperature (Tg). Moisture absorptio